Pulley



(No Model.) 7 v I P. GONYNGHAM 81; W. R. GIBBONS.

PULLEY.

No. 519,493. Patented May 8, 1894.

M Ll WOIZAS;

UNITED STATES.

, PHILIP CONYNGHAM AND- P-ATENT ()FFTCE.

WILLIAM R. GIBBONS, or WILKEs-BARRE, PENNSYLVANIA.

PU LLEY.

SPECIFICATION forming part of Letters Patent No. 519,493, dated May 8, 1894.

Application filed August 4,1893. Serial No. 482.357. N0 model.)

T0 at whom it may concern Be it known that we, PHILIP CONYNGHAM and WILLIAllfR. GIBBONS, citizens of the United States, residing at-Wilkes-Barr, in

the county of Luzerne and State of Pennsyl-,

Vania, have invented a new and useful Pulley, of which the following is a specification.

The invention relates to improvements in pulleys.

The object of the present invention is to improve the construction of band pulleys and to provide a simple and inexpensive one in which the parts when worn may be readily replaced without necessitating an entireseparation of the parts of it.

The invention consists in the construction and novel combination, and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings: Figure 1 is a side elevation of a pulley constructed in accordance with this invention. Fig. 2 is a transverse sectional view on line a::r; of Fig. 1. Fig. 3 is a longitudinal sectional View on line y'y of Fig. 2. Fig. 4 is a detail view of one of the attachment plates.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

1 designates a pulley comprising a hub 2, a

separate rim 3 provided with an annular recess 4, and series of Wedge-shaped blocks 5,

arranged in the annular recess or groove 4,

of the rim 3. The hub is designed to be secured on a shaft 6 by a clamping-screw 7, or

other suitable means, and it is provided with a central annular web 8, arranged within and against'lateral movement on each other bybolts 12, which prevent the rim from becoming separated from the Web of the hub. The

bolts 12 are transversely disposed and are arranged in registeringsemi-cylindrical recesses 13 and 14 of the web 8 and the flange 9. The rim consists of a cylindrical bottom 15, and parallel circular sides 16, and is rectangular in cross-section to provide the space or groove 4 for-the reception of the removable wedgeshaped blocks 5, which form the periphery of the band pulley. The sides 16 of the rim are provided on their inner faces with inwardlyextending integral radially-disposed division flanges 17, which divide the annular space 4 into three or more compartments for the reception of the wedge-shaped blocks. Theblocks 5 are arranged in series of three, and the ribs or flanges 17 vary according to the size of the pulley, the larger the pulley the greater the number of flanges 17 being employed; and the blocks'are correspondingly increased in number. At their circumferences the sides 16 are provided at intervals-with inwardly-extending curved flanges'lS, which form an overhanging edge toengage theend-blocks of the series, spaces 19 being left to enable the blocks to be inserted. The intermediate blocks of the series operate to wedge the other blocks against the radial flanges 17, and each intermediate block is secured in place at opposite sides of the rimofthe pulley by-inclined screws 20 and attachment plates 21, which are curved and which fill the spaces 19 and complete the curved flanges 18 of the rim, thereby securely fastening the blocks in the rimof. the pulley. Each inclined screw is arranged in a threaded opening-of a'boss 22 and extends through the side of the rim and engages the block. The

plate 21 is provided with a shank 23, which has an opening to receive the screw 20, and which is bent angularly and fits against the outer face of the boss and is securelyclamped by a jam-nut 24. The outer edges of the blocks 5 are concaved, and ,whenever the blocks become worn they may be readily re placed Without necessitating the separation of the rim and the hub.

It will be readily apparent thatthe pulley is simple and inexpensive in construction, that'its parts may be readily assembled, and that when its periphery becomes'worn it may be readily replaced.'

[Changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention. What we claim is 1. A pulley, comprisinga hub provided with an annular web having transversely-disposed ribs, a rim provided with an annular flange conforming to the configuration of the web and forming a continuation thereof and having recesses corresponding in shape to and receiving the ribs, and fastening devices passing through oppositely disposed recesses of the web and the flange for preventing the flange and the Web from moving laterally on each other, substantially as described.

2. A pulley, comprising a hub provided with an annular web having transversely-disposed projecting ribs of semi-cylindrical shape, a rim provided with a flange conformingto the configuration of the web and forming a continuation thereof and having curved recesses receiving the ribs, and transverse bolts passing through oppositely disposed recesses of the web and the flange and arranged in registering recesses thereof and securing the parts against lateral movement, substantially as described.

3. A pulley, comprising a hub, a rim having an annular space and provided at its opposite outer edges with inwardly extending curved flanges forming overhanging edges and having entrance spaces between the flanges, wedgeshaped blocks inserted at the entrance spaces and arranged within the annular space, curved plates closing the entrance spaces and having curved flanges completing the curved flanges of the rim and projecting inward over the adjacent blocks, and 40 screws passing through the plates and the sides of the rim and securing the plates in position and engaging the adjacent blocks,

substantially as described.

same with radial flanges having circumferential curved flanges arranged at intervals, said rim being provided with interiorly threaded bosses Wedge shaped blocks arranged in series in the annular space of the rim, curved plates arranged at the intervals between the curved flanges of the rim and provided with shanks arranged adjacent to the sides of the rim, inclined screws passing through the shanks and the bosses of the rim and engaging the adjacent blocks, and jamnuts arranged on the screws and engaging the shanks of the plates, substantially as described.

5. A pulley, comprisinga hub provided with an annular web having transversely-disposed projecting ribs, a rim having an annular space and provided with an annular flange conforming to the configuration of the web and provided with recesses receiving said ribs, said rim being provided at its circumference with inwardly extending curved flanges arranged at intervals, fastening devices passing through the web and the annular flange and securing those parts from moving laterally on each other, wedge-shaped blocks arranged in series on the annular space of the rim, and curved plates arranged at the intervals between the curved flanges of the rim and projecting inward over the adjacent blocks, substantially as described.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.

PHILIP OONYNGHAM. WVILLIAM R. GIBBONS.

Wi t n esses W. S. PARSONS, THEo. REMIFERN. 

